CAJ | 학술논문

针对我国南方部分地区35kV架空输电线路雷击事故严重的情况，设计一种基于“疏导型”防雷理念和“气吹灭弧”相结合的灭弧防雷间隙，该间隙在输电线路发生雷击时能优先于绝缘子串闪络，将雷电流导入大地的同时熄灭工频续流。通过小电流灭弧特性试验和仿真建立的灭弧防雷间隙的PSCAD仿真计算模型，针对广西大化县35kV架空输电线路的仿真计算结果和实际运行情况表明，输电线路安装灭弧防雷间隙可有效抑制雷击过电压，降低线路的雷击跳闸率。
침대아국남방부분지구35kV가공수전선로뢰격사고엄중적정황，설계일충기우“소도형”방뢰이념화“기취멸호”상결합적멸호방뢰간극，해간극재수전선로발생뢰격시능우선우절연자천섬락，장뇌전류도입대지적동시식멸공빈속류。통과소전류멸호특성시험화방진건립적멸호방뢰간극적PSCAD방진계산모형，침대엄서대화현35kV가공수전선로적방진계산결과화실제운행정황표명，수전선로안장멸호방뢰간극가유효억제뢰격과전압，강저선로적뢰격도갑솔。
In allusion to serious situation that the faults caused by lightning stroke frequently occur in 35 kV overhead transmission lines in part of South China, an air-blast arc-quenching gap based on the ＂scatter＂ thinking of lightning protection is designed. When lightning strikes on overhead transmission line, the designed air-blast arc-quenching gap can flashover prior to the flashover of insulator string and the power frequency afterflow will be quenched while the lightning current is being flowed into ground via the designed gap. Based on the testing data from small-current arc-quenching property tests of the designed gap and simulation results, a-PSCAD model of the designed gap is built, and the simulation results of 35 kV overhead transmission line located in Dahua county, the Guangxi Zhuang Autonomous Region as well as the actual operation effect of the gap show that lightning overvoltage can be effectively suppressed by installing the designed gap on 35 kV overhead transmission lines, thus the lightning trip-out rate of overhead ＇;transmission line can be decreased.